<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <title>列表排序</title>
    <!-- 引入Vue -->
    <script type="text/javascript" src="../js/vue.js"></script>
</head>

<body>

    <!-- 准备好一个容器 -->
    <div id="root">
        <!-- 遍历数组 -->
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyWord">
        <button @click="sortType=2">年龄升序</button>
        <button @click="sortType=1">年龄降序</button>
        <button @click="sortType=0">原顺序</button>
        <ul>
            <li v-for="(p,index) in filPerson" :key="p.id">
                {{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul>
    </div>
</body>
<script type="text/javascript">
    Vue.config.productionTip = false; //阻止Vue启动时生成生产提示

    const vm = new Vue({
        el: '#root',
        data: {
            keyWord: '',
            sortType: 0, // 0原顺序 1降序 2升序
            persons: [
                { id: '001', name: "马冬梅", age: 19, sex: "女" },
                { id: '002', name: "周冬雨", age: 18, sex: "女" },
                { id: '003', name: "周杰伦", age: 21, sex: "男" },
                { id: '004', name: "温兆伦", age: 20, sex: "男" }
            ]
        },
        computed: {
            filPerson() {
                const arr = this.persons.filter((p) => {
                    return p.name.indexOf(this.keyWord) !== -1;
                });
                //判断一下是否需要排序 `if(this.sortType != 0){}`可以简写成下面这个形式
                if (this.sortType) {
                    arr.sort((p1, p2) => {
                        return this.sortType === 2 ? p1.age - p2.age : p2.age - p1.age;
                    })
                }
                return arr;
            }
        },
    });
    //排序
    let arr = [1, 3, 2, 6, 4, 5];
    arr.sort((a, b) => {
        return b - a;
    });
    console.log(arr);

</script>

</html>